Jepson Flora Project: Jepson Interchange    
 

The Jepson Manual: Higher Plants of California

    THIS PAGE IS NO LONGER UPDATED
    AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

Names are linked to treatments from the Manual


Key to POLYPODIUM

N.B.: couplets are linked, e.g., 1. is linked to 1'.

  1. Upper surface leaf blade midrib glabrous, blade ± membranous to leathery, not fleshy
 
    2. Leaf segment generally < 2.5 cm, generally < 1 cm wide; leaf blade ± membranous to ± thick, not leathery, ± firm, not brittle; sori round to ovate, 1–3 mm
P. hesperium
    2' Leaf segment 2.5–7(10) cm, 0.9–1.8(2.5) cm wide; leaf blade thick, leathery, firm, brittle; sori ovate to round, 2–6 mm
P. scouleri
  1' Upper surface leaf blade midrib hairy, if glabrous, blade membranous to fleshy, not leathery, often firm
 
    3. Veins free; sori generally round
P. glycyrrhiza
    3' Veins free and fused; sori generally ovate
 
      4. Leaf blade deltate to ovate, often ± irregular in outline, lower 1–3 segment pairs often = or > those above; sori ± sunken, ± flat, round to generally ovate; North Coast, Central Coast, Outer South Coast Ranges, Southwestern California (except perhaps San Jacinto Mountains)
P. californicum
      4' Leaf blade oblong-ovate, ± regular in outline, lower 1–3 segment pairs generally < those above; sori raised, ovate; Northwestern California (except High North Coast Ranges), Cascade Range Foothills, Sierra Nevada (except s Sierra Nevada Foothills), Sacramento Valley, Central Western California
P. calirhiza


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